@misc{indiciae2db3a28cda5b,
  title = {Photogeologic map of the Hurricane Cliffs-2 NE quadrangle, Mohave County, Arizona},
  author = {C. H. Marshall},
  year = {1957},
  doi = {10.3133/i252},
  url = {https://pubs.usgs.gov/publication/i252},
  note = {Source identifier: i252}
}